An original pile. It is a term of respect, much like "Sir," as opposed to "Mr." Don't try to incorporate this on in to usage, only a Grim can call another person Grim, Its sort of like, its the special ceremonial name for a pile, so don't wear it out. used properly, say, when answering your cell phone when you know who's calling "Hey, Grimm." Coined From the band The Grimm, and its Original Pile Member, Tim Grimm.